Buffing machine



P 1932- A. s. JOHNSON ET AL.

BUFFING MACHINE Filed Aug. 6. 1931 2 Sheets-Sheet Sept. 27, 1932.

A. S. JOHNSON ET AL.

BUFFING MACHINE 2 Sheets-Sheet 2 Filed Aug. 6, 1931 out of the machine;

Patented Sept. 27; 1932 UNITED 1 STATES PATENT OFFICE] 1 ARVID s. JOHNSON, or nunimmnnn nnnnnnr w. NEUNHERZ, or GARDNER, Nessa cnusnrrs, ASSIGNORS 'ro GEM can; & CRADLE COMPANY, OF GARDNERLMASSAYI- cHUsEr'rs, aconronsrron or MASSACHUSETTS nrrrrmc acrame Application fi led August a, 1931; .SerlaINo. 555,554.

This invention relates to a machine for rapidly buffingrods of considerable length.

The principal objects of the invention are to provide a machine in which the rods can be inserted almost instantaneously and from which they can be taken out after bufling net as quickly; to provide for giving a continuous feed to acarriage on which the work is located; to provide means whereby at the start the rod will be polished as much as it will elsewhere; to provide an improved form of holder for the rods; to provide a simple construction in which the rod can be moved back away from the butting wheel for the exchange of a completed rod for a new one and to provide convenient means for rotating the rod when its surface is being polished.

Other objects and advantages of the invention will appear hereinafter.

. Reference is to be had to the accompanying drawings, in which 7 .Fig. 1 is a plan of a machine constructed in accordancefwith this invention showing the beginning of the operation; I

Fig.2 is a sectional view on the line 2-2 ofFig.1;- Fig. 3 is a-sectional view on the line 33 of Fig. 1 showing the end support for the rod to be buffed; 1 Fig. 4 is a sectional view on the line of Fig. 1, showing-one of the rests in which the rods are to be put when they are taken -Fig. 5 is a sectional viewon the line 55 of Fig. 1 showing the, connection between the screw and the rotating means for the rod;

Fig. 6 is an enlarged plan of the means for holding and rotating one end of the rod;

Fig. 7 is an end view looking in the direction of the arrow 7 in Fig. 6, showing the holding means;

Fig 8 is a view of a bed post rod on which the machine is adapted to operate, and

Fig; 9 is a View of a modification showing a means for holding theend of the rod when a straight metal or wooden rod is to be buffed or polished on this machine.

. The machine shown is designated for polishing or bufiing rather long cylindrical bed postrods, particularly of the type shown in Fig.8. This rod 10 vprovide d'with an end 11 bent at right angles thereto and most of the description will. refer to the operation.

of the machine onaj rod of that general shape. The machine is capable of use on cylindrical rodsof many other types and can be used to smoothwooden rods, using a sand wheel. 7 Heretofo're the polishing operation has been done practically byhand, the operator handling the rod andone ofthe objects of.

this invention is to provide means whereby the rod is simply inserted in the machine in a very quick manner and the rest of the opera .tion is performed automatically; except the removal of the rod. e

The machine is shown operated by a motor 12, which, through any means of transmission,rotates a feed screw 13. This feed screw v 13 is mounted on stationary bearings on the frame lt'ofthe machine; This frameis provided with a pivot shaft 15 or studs for pivotally. holding. a frame 16. ,Normally this frame 16:re sts on an. adjustable stop 9.: From the frame '16, extending down toa point near the floor, is means for supporting a pedal 17 This pedal can be forced down by the foot, as will be seenlater, -to draw back the work from: the butting wheel 18, or a wheel carried withisand paper, against the opposition of a spring 39. This wheel is mounted on a shaft 19, carried by the frame, and rotated either by the motor 12 or in any desired way. I The frame f16 .i s provided, with Y av support and guide 20 in which is mountedta slide 21,

ways or gibs 22 being provided-to. hold the 'slide to move. longitudinally but not otherwise. ;This slide carries at one end a bracket 23- on which is acircular. support 24 for the extreme end ,of-the rod and, ofcourse, this support moves with the slide. Also mounted -on the frame 16 in stationary" position is a backing up bracket 25 having a rest 26, which is not circularbut, provides a shelf-like supportagainst whichthe rod is held; This back up rest is located in registration with the buifing or polishing wheel 18 and-does not'move rotate in the frame 27. To this shaft is keyed a disc or wheel 29 capable of moving longitudinally on the shaft 28 but slidingly keyed to it so as to be adapted to rotate it. A spring 30 bearing on the frame 27 normally holds this disc in the position shown in Fig. 6. Connected with the slide 21- or the frame 27 is a cable 31 passing'over pulleys 32andhaving a weight 33 thereon, which of course, hangs downwardly and normally pulls the slide back and holds the disc 29 in frictional engagement with the screw threads.

The disc 29 projects in between the screw threads on the screw 13and of course, it is forced to move longitudinally as the screw is rotated- Furthermore, it is forced to rotate by friction with the threads of the screw. The end of the shaft 28 is provided with a holding means for the end 11 of the wire 10. This comprises a longitudinal slot 34 and a radial slot 36 through which the end 11 of the wire can extend It also includes 'a-pair o-fopposite round ended pins 35 pressedinwardly by a spring 46 to enter the slot 34.

g It will be seen that when the shaft 28 is positioned, as shown in Figs. 1, 6 and 7, with this slot 34 at the top and the slot 36 vertical, the end of the rod can be forced in past the round ended pins 35 clear to the center of this shaft where it comes up against the semicylindrical end ofthe slot 34. The pins 35 prevent its being dislodged by any ordinary forces. a f

In this wayit will be seen that the rods are centered at both. ends and backed up at the end of the buffing wheel. Now, with the parts as shown in Fig. 1, the motor 12 is started and the bufling wheel also is rotated at full speed The rotation of the screw rotates the disc 29 in this position until the spring 30 is pressed sufficiently to cause further rotation of the screw to move the whole slide 21 along. with the disc. During this period, the rod 10 willturn. a few turnsand receive an even butting action at its advance end. After that, the slide 21 will move along until the disc 29 is nearly at the end of the screw and, the entire straight surface of the rodis buffed'except for the twoextreme ends which are in the supports.

, V Now theoperator presses-on thepedal and he not only moves the rod, which has been buffed, away, from the huffing wheel but he also moves the disc 29, carried on the frame 16, away from the screw. The screw and bufling wheel therefore can be allowed to continue to rotate and they do not have .to be stopped between operations. The operator nowpulls the right hand end of the rod out of the holder between the pins35, re-

moves the rod, and deposits it in a pair of supports 37, two of them being enough to support abundle of these rods.

Fromthis it will be seen that themachine is not only simple but the rods can be applied,

removed, put in a place for temporary storage, a new rod applied and the new rod put into engagement With the bufling wheel while the slide 21 is moved back by the weight 33 to the positionshown in Fig. 1, ready for a new operation. This greatly simplifies all the operations and reduces the cost thereof very materially.

In Fig.9 a simple modification is shown in which on the shaft 28 is mounted a chuck 39 for holding a straight rod 40,a. screw 41 beingapplied to secure it in position. Therefore this machine is capable of operating on the rods illustratedv in Fig. 8 and also on straight rods almost with equal facility.

Although we have illustrated and described only two forms of the invention We are aware of the'fact that other modifications can be made therein by any person skilled in the art without departing from the spirit of theinvention as expressed in the claims. Therefore-we do not wish to be limited in this respect but what we do claim is 1. In a machine for buffing rods or the like, the combination of a slide having a support for one end of the rod carried'thereon, a rotatable support carried by the slide for the other end of the rod, a disc connected with the-rotatable support to rotate it, and a rotatable screw, said disc projecting-between the screw threads, whereby it will be rotated and moved longitudinally by the rotation'of the screw and will carry the rod-with it.

2. In a machine for buffing rods and the like the combination of a slide having a support for the rod carried thereon, a rotatable support carried by the slide for the other end ofthe rod, a disc -connectedwith the rotatable I support to rotate it',a screw, means for rotating the screw, said disc being located to project between the screw threads, whereby it will be rotated and moved longitudinally by that rotation, and means for mounting the disc on the slide for the purpose of moving tlie'slide along in a'lineparallel withthe rod and the axis of the screw.

" 3; In a machine for bufiing rods and the like, the combination with a rotary buffing wheel, of a slide movable in a directionparah lel to the axis of the buftingwheel, said slide carrying means for'supporting the end of the rod'in position to be buffed by the wheel, a rotary shaft carried by the slide having means for supporting the opposite end of the rod, a' disc slidably keyed to the shaft, and a rotatable screwbetween the threads of which the disc projects, whereby the rotation of the screw will rotate the disc and rod and cause t e disc, together withthe slide on which it is mounted, to move longitudinally, the rod being supported in a position to engage the wheel..

' 4. In a buffing machine, the combination of a slide for carrying the work, said slide having a'rotatable shaft thereon constituting i Iii! a support for one end of the work, a frame on the slide having bearings for the shaft, adisc slidably keyed to the shaft to rotate it, a spring between one side of the frame and the. disc and a screw engaging the disc for rotating the disc and moving the slide.

5. In a machine for buffing rods and the like, the combination with a rotary buffing wheel, of a slide, means for guiding the slide" to move longitudinally of the machine, two supports carried by the slide. for the opposite ends of the rod, one being stationary and the other rotatable and being in position to hold the rod against the buffing wheel, a shaftcarri'ed by the slide on which the rotatable support is mounted, a disc slidable on said' shaft and slidably keyed thereto, a spring normally forcing the disc back on the shaft, a rotatable screw between the threads of which the disc projects, whereby, when the screw starts to rotate, the rod will be given several turns before the slide willstart to move, due to the action of the screw on the disc, thereby polishing the end of the rod more than the rest of it.

6. In a bufling machine, the combination with a rotary bufiing wheel, of a frame hav ing longitudinal ways, a slide mounted to move in said ways, a counterweight for normally moving the slide backwardly, a shaft rotatably mounted on the slide, a disc keyed to the shaft, a screw into the threads of which the disc projects and against which the disc is held by the counterweight, whereby the rotation of the screw will rotate the disc and move the slide in its ways.

7. In a bufiing machine, the combination with a rotary buifing wheel, of a screw mounted on an axis parallel with the axis of the buffing wheel, a stationary frame on which the bufiing wheel and screw are mounted, said frame having pivots or bearings, an

oscillating frame mounted on said pivots and having longitudinal ways, a slide movable in said ways, a disc carried by the slide and co operating with the screw for moving. the slide, means on the slide for carrying the. work along the surface of the buffing wheel, said pivoted frame being adapted to swing back on its pivot to bring the disc out of contact with the screw for removal ment of the work. r

8. In a bufiing machine, the combination with a rotary bufing wheel, of a screw mounted on an axis parallel with the axis of the buffing wheel, means for rotating the screw, a stationary frame on which the buffing wheel and screw are mounted, said frame having pivots or bearings, an oscillating frame.

the combination of a. rotary bufling wheel and a rotary screw mounted on parallel axes, a stationary frame on which they are supported, an oscillatable frame pivoted on the first named frame on a longitudinal axis,

means carried by the oscillatable frame for pressing the work against the bufling wheel,"

means carried by the oscillating frame for rotating the work from the screw and moving the work longitudinally from the rotation of the screw, and a treadle connected with said oscillating frame for swin 'ng the frame back to a position in which ti will be out of contact with said bufling wheel.

In testimony whereof we have hereunto afiixed our signatures.

'ARVID s. JOHNSON,

V HERBERT w. NEUNHERZ.

and replacemounted on said pivots and having longitudinal Ways, a slide movable in said ways, means always acting on the slide to move it in one direction, a disc carried by the slide and cooperating with the screw for moving the slide in the opposite direction, means on the slide for e Work 1 

